Burglar alarm



June 1953 s. TALUCCI 2,640,455

BURGLAR ALARM Filed Oct. 25, 1951 Samuel Tb/ucci 1N VEN TOR.

BY M,

Patented June 2, 1953 UNITED STATES PATENT OFFICE BURGLAR ALARM SamuelTalucci, Philadelphia, Pa.

Application 'ctober'25, 1951, serialNo. 253,147

301ain'1s. l The present invention relates to new and usefulimprovements in burglar alarms for use particularly on sliding windowsashes and has for its primary object to provide in a manner ashereinafter set forth, a device of this character embodying novel meansfor sounding one or more sharp signals if the sash is raised to openposition, thereby warning the occupants of the house or building andfrightening off the intruder.

Another important object of the invention is to provide a burglar alarmof the aforementioned character which may be readily renderedinoperative when desired.

Other objects of the invention are to provide a burglar alarm of thecharacter described which will be comparatively simple in construction,strong, durable, highly efficient and reliable in use, compact,inconspicuous and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of theinvention will bec-omeapparent from a study of the followingspecification, taken in connection with the accompanying drawing,wherein like characters of reference designate corresponding partsthroughout the several views, and wherein:

Figure 1 is a view in front elevation, showing a burglar alarm inaccordance with the present invention installed on a window.

Figure 2 is a vertical sectional view, taken substantially on the line2-2 of Figure 1;

Figure 3 is a vertical sectional view, taken substantially on the line3--3 of Figure 1;

Figure 4 is a View in horizontal section, taken substantially on theline 4& of Figure 3;

Figure 5 is a fragmentary view in horizontal section, takensubstantially on the line 5-5 of Figure 2;

Figure 6 is a detail view in side elevation of the portion of thehousing on which the slidable latch is mounted; and

Figure '7 is a perspective view of the stationary actuating device.

Referring now to the drawings in detail, it will be seen that theembodiment of the invention which has been illustrated comprises avertically elongated housing of metal or other suitable material whichis designated generally by reference numeral it. The housing ll]includes compiemental sections H and i2. The section 5 i is formed froma single sheet of suitable metal and comprises a base or back wall I3having side walls I l formed. integrally therewith. The housing sectionI2 is also formed from a single sheet of suitable metal and comprises afront wall I5 together with integral upper and" lower end walls Hi. Theend walls iii are" provided with outwardlyturned apertured ears-Ilwhich' accommodate screws i8 for firmly securing the unit ID inposition on the inner face of the side rail [9 of a slidablelower'window sash. The walls l5 and it of the housing section i2 have formedintegrally therewith marginal flanges-2| which overlie the side walls I4.

Mounted vertically in the housing lllis' a fiat spring 22having itsupper-end portionlflrmly securedto'the back wall it as at 23, the'lowerend of said spring being free. Mounted on the free lower end porti" of"the. spring 22, as at 2 3', is an upwardly div ent arm 2 5.

The front ed ofthe side'walls It, also the opposed flanges 21- of thefront wall It, are notched in a manner to provide" bearings 26"; inwhich a crank shaft 21 isjournaied. At one end, the crankshaft 27terminates in an arm orfinger 28 which extends adjacent one of the sidewalls it; Thepurpose-of the member 28 will be' presently' set'forth.Mountedin the housing if) on the front wall ii thereof isan upwardly andrearwardly inclined shock absorbing and return spring 29 for thecrankshaft 21. This return or bumper spring 29 is secured at 3El'to thewall i5.

Mounted on the window frame 3-! adjacent to but above the unit I0 is anactuator 32. The actuator 32 is in the form of a channel bar 33 providedon one side with an integral flange 34 which is apertured to accommodatescrews for firmly securing said actuator in position on the window frameiii. The channel bar 33 has formed therein a series of longitudinalslots 35 defining spaced transverse bars or obstructions 36, the purposeof which will also be presently set forth.

As best seen in Figure 6 of the drawing, the lower portion of the frontedge of one of the side walls 14 is cut away or recessed as at 31 toaccommodate a 1atch'38 which-is slidable on the housing II]. The latch3.8" includes a substantially U-shaped marginal portion 39 (see Figure5) which is operable in the recess 31 between the front wall 43 and theside wall I4 on which said latch is mounted. The latch 38 is provided onits lower end with an operating handle 40. An ear or lug 4i extendsoutwardly from the upper end portion of the latch 38 for engagement withthe arm or finger 23 for rendering the device inoperative when desired.

It is thought that the operation of the alarm will be readily apparentfrom a consideration of the foregoing. Briefly, when the device is setfor operation with the sash 20 in lowered position or substantially so,the crankshaft 2T normally rests by gravity on the inclined arm 25substantially as shown in full lines in Figure 3 of the drawing. iheactuator 34 is in the vertical path of the free end portion of the armor finger 28. Thus, should the sash 20 be raised to open position thearm, finger or lever 28 enters the channel bar 23 and successivelystrikes the bars 36 and is swung downwardly and outwardly thereby. Inthis manner the crankshaft 21 is actuated to flex the spring 22 to theposition shown in dotted lines in Figure 3 in the drawing. As the arm orlever 28 clears the members 36 the spring 22 is suddenly released andsnaps back to its former position, giving a sharp audible signal as itdoes so. When this occurs the crankshaft 21 is thrown upwardly by thearm 25 but strikes the resilient bumper 29 and is instantly returned :bysaid bumper and by gravity to lowered position in engagement with saidarm 25. Thus, engagement of the arm or lever 28 with each of theelements 36 is insured. If the sash 20 is lowered the arm or lever 28simply rides over the elements 36 and the crankshaft 2'! swings idly. Torender the device inoperative, the arm or lever 28 is swung upwardly toa vertical position as suggested in Figure 2 of the drawing and thelatch 38 is then elevated for engaging the lug or ear 4| with said armor lever for retaining the same.

It is believed that the many advantages of the burglar alarm constructedin accordance with the present invention will be readily understood andalthough a preferred embodiment of the device is as illustrated and.described, it is to be understood that changes in the details ofconstruction and in the combination and arrangement of the parts may beresorted to which will fall within the scope of the invention asclaimed.

Having described the invention, what is claimed as new is:

1. A burglar alarm of the character described comprising a verticallyelongated housing for mounting on a slidable window sash, a flatsounding spring mounted in the housing and having one end portionsecured thereto, the other end portion of said spring being free, an armon said other end portion of the spring, a crank shaft journaled in thehousing and engaged with the arm for actuating the spring, and anoperating lever on one end of said crankshaft.

2. A burglar alarm comprising a housing for mounting on a window sash,said housing comprising a pair of complemental section secured together,one of said sections including a back wall and side walls integral withsaid back wall and having notches therein, the other of said sectionsincluding a front wall and end walls integral with the front wall,attaching ears on the end walls, a sounding spring mounted on said backwall, a crankshaft journaled in the notches and operatively connected tothe sounding spring, and an operating lever on one end of saidcrankshaft, said other section further including marginal flanges onsaid front wall overlying the side walls and engaged with the crankshaftfor retaining same in the notches.

3. A burglar alarm of the character described comprising a housing formounting on a window sash, a fiat sounding spring mounted in thehousing, a crankshaft journaled in the housing and operatively connectedto the sounding spring for actuating the same, an operating lever on oneend of the crankshaft, and a manually operable latch slidably mounted onthe housing and engageable with the lever for securing the crankshaft ininoperative position in the housing.

SAMUEL TALUCCI.

References Cited in the file of this patent UNITED STATES PATENTS Number

